ShuriZma
/
melonDS
mirror of https://github.com/melonDS-emu/melonDS.git
1
0
Fork 0
Code Issues Packages Projects Releases Wiki Activity

cache imp

This commit is contained in:
Jaklyy 2024-10-09 18:05:26 -04:00
parent 225bd50e13
commit f2bc0fae4d
1 changed files with 24 additions and 4 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

28
src/CP15.cpp
View File

@ -385,6 +385,7 @@ u32 ARMv5::ICacheLookup(const u32 addr)
// Disabled ICACHE Streaming:
// retreive the data from memory, even if the data was cached
// See arm946e-s Rev 1 technical manual, 2.3.15 "Register 15, test State Register")
WriteBufferDrain();
CodeCycles = NDS.ARM9MemTimings[tag >> 14][2];
if (CodeMem.Mem)
{
@ -407,6 +408,7 @@ u32 ARMv5::ICacheLookup(const u32 addr)
// BIST test State register (See arm946e-s Rev 1 technical manual, 2.3.15 "Register 15, test State Register")
if (CP15BISTTestStateRegister & CP15_BIST_TR_DISABLE_ICACHE_LINEFILL) [[unlikely]]
{
WriteBufferDrain();
CodeCycles = NDS.ARM9MemTimings[tag >> 14][2];
if (CodeMem.Mem)
{
@ -447,6 +449,8 @@ u32 ARMv5::ICacheLookup(const u32 addr)
u32* ptr = (u32 *)&ICache[line << ICACHE_LINELENGTH_LOG2];
WriteBufferDrain();
if (CodeMem.Mem)
{
memcpy(ptr, &CodeMem.Mem[tag & CodeMem.Mask], ICACHE_LINELENGTH);
@ -534,6 +538,7 @@ u32 ARMv5::DCacheLookup(const u32 addr)
// Disabled DCACHE Streaming:
// retreive the data from memory, even if the data was cached
// See arm946e-s Rev 1 technical manual, 2.3.15 "Register 15, test State Register")
WriteBufferDrain();
DataCycles = NDS.ARM9MemTimings[tag >> 14][2];
if (addr < ITCMSize)
{
@ -560,6 +565,7 @@ u32 ARMv5::DCacheLookup(const u32 addr)
// BIST test State register (See arm946e-s Rev 1 technical manual, 2.3.15 "Register 15, test State Register")
if (CP15BISTTestStateRegister & CP15_BIST_TR_DISABLE_DCACHE_LINEFILL) [[unlikely]]
{
WriteBufferDrain();
DataCycles = NDS.ARM9MemTimings[tag >> 14][2];
if (addr < ITCMSize)
{
@ -609,6 +615,8 @@ u32 ARMv5::DCacheLookup(const u32 addr)
// Datacycles will be incremented by the required cycles to do so
DCacheClearByASetAndWay(line & (DCACHE_SETS-1), line >> DCACHE_SETS_LOG2);
#endif
WriteBufferDrain();
//Log(LogLevel::Debug,"DCache miss, load @ %08x\n", tag);
for (int i = 0; i < DCACHE_LINELENGTH; i+=sizeof(u32))
{
@ -831,7 +839,13 @@ void ARMv5::DCacheClearByASetAndWay(const u8 cacheSet, const u8 cacheLine)
if (DCacheTags[index] & CACHE_FLAG_DIRTY_LOWERHALF)
{
//Log(LogLevel::Debug, "Writing back %i / %i, lower half -> %08lx\n", cacheSet, cacheLine, tag);
WriteBufferWrite(tag, 3, 1);
WriteBufferWrite(ptr[0x00], 2, MemTimings[tag >> 12][2], tag+0x00);
WriteBufferWrite(ptr[0x04], 2, MemTimings[tag >> 12][3], tag+0x04);
WriteBufferWrite(ptr[0x08], 2, MemTimings[tag >> 12][3], tag+0x08);
WriteBufferWrite(ptr[0x0C], 2, MemTimings[tag >> 12][3], tag+0x0C);
DataCycles += 5;
/*//Log(LogLevel::Debug, "Writing back %i / %i, lower half -> %08lx\n", cacheSet, cacheLine, tag);
for (int i = 0; i < DCACHE_LINELENGTH / 2; i+=sizeof(u32))
{
//Log(LogLevel::Debug, " WB Value %08x\n", ptr[i >> 2]);
@ -848,12 +862,12 @@ void ARMv5::DCacheClearByASetAndWay(const u8 cacheSet, const u8 cacheLine)
BusWrite32(tag+i, ptr[i >> 2]);
}
}
DataCycles += (NDS.ARM9MemTimings[tag >> 14][2] + (NDS.ARM9MemTimings[tag >> 14][3] * ((DCACHE_LINELENGTH / 8) - 1))) << NDS.ARM9ClockShift;
DataCycles += (NDS.ARM9MemTimings[tag >> 14][2] + (NDS.ARM9MemTimings[tag >> 14][3] * ((DCACHE_LINELENGTH / 8) - 1))) << NDS.ARM9ClockShift;*/
}
if (DCacheTags[index] & CACHE_FLAG_DIRTY_UPPERHALF)
{
//Log(LogLevel::Debug, "Writing back %i / %i, upper half-> %08lx\n", cacheSet, cacheLine, tag);
for (int i = DCACHE_LINELENGTH / 2; i < DCACHE_LINELENGTH; i+=sizeof(u32))
/*for (int i = DCACHE_LINELENGTH / 2; i < DCACHE_LINELENGTH; i+=sizeof(u32))
{
//Log(LogLevel::Debug, " WB Value %08x\n", ptr[i >> 2]);
if (tag+i < ITCMSize)
@ -869,7 +883,13 @@ void ARMv5::DCacheClearByASetAndWay(const u8 cacheSet, const u8 cacheLine)
BusWrite32(tag+i, ptr[i >> 2]);
}
}
DataCycles += (NDS.ARM9MemTimings[tag >> 14][2] + (NDS.ARM9MemTimings[tag >> 14][3] * ((DCACHE_LINELENGTH / 8) - 1))) << NDS.ARM9ClockShift;
DataCycles += (NDS.ARM9MemTimings[tag >> 14][2] + (NDS.ARM9MemTimings[tag >> 14][3] * ((DCACHE_LINELENGTH / 8) - 1))) << NDS.ARM9ClockShift;*/
WriteBufferWrite(tag+0x10, 3, 1);
WriteBufferWrite(ptr[0x10], 2, MemTimings[tag >> 12][2], tag+0x10);
WriteBufferWrite(ptr[0x14], 2, MemTimings[tag >> 12][3], tag+0x14);
WriteBufferWrite(ptr[0x18], 2, MemTimings[tag >> 12][3], tag+0x18);
WriteBufferWrite(ptr[0x1C], 2, MemTimings[tag >> 12][3], tag+0x1C);
DataCycles += 5;
}
DCacheTags[index] &= ~(CACHE_FLAG_DIRTY_LOWERHALF | CACHE_FLAG_DIRTY_UPPERHALF);
#endif